Really need some help with battery issues

I bought the S4 the day after it was released on Verizon. It's my first trip back to Android from iOS since the Moto Droid 1 and I love it, the options are vast and superior. However my battery life seems to be very low. For a 2600 mAh battery I'm only getting about 10 hours off charger with about 2 1/2 hours of screen on time and I hit about 30% battery. That's with Mobile Data off, Power Saver Mode On, GPS off, All Gestures off, Wifi On (full service) and adjusted Auto Display. I went to Verizon and they switched out my battery to see if that may have been the problem but it doesn't seem to have helped. I'm currently running Battery Guru to see if it can help assess the situation. My question is this, is it possible that there's a fault in the phone and not battery? Would calling Samsung and having them give me a new phone be worth my while or just more trouble? My main uses are showing Screen at 51% and Android System at 23% (I feel like the OS should not be using up that much battery) Any help or advice would be greatly appreciated! Thanks a lot guys!

I bought the S4 the day after it was released on Verizon. It's my first trip back to Android from iOS since the Moto Droid 1 and I love it, the options are vast and superior. However my battery life seems to be very low. For a 2600 mAh battery I'm only getting about 10 hours off charger with about 2 1/2 hours of screen on time and I hit about 30% battery. That's with Mobile Data off, Power Saver Mode On, GPS off, All Gestures off, Wifi On (full service) and adjusted Auto Display. I went to Verizon and they switched out my battery to see if that may have been the problem but it doesn't seem to have helped. I'm currently running Battery Guru to see if it can help assess the situation. My question is this, is it possible that there's a fault in the phone and not battery? Would calling Samsung and having them give me a new phone be worth my while or just more trouble? My main uses are showing Screen at 51% and Android System at 23% (I feel like the OS should not be using up that much battery) Any help or advice would be greatly appreciated! Thanks a lot guys!

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I find it funny that those that cripple their devices often have the biggest issues with battery life!

1. Disable "auto-brightness". It's known to use power. Just manually set it at the lowest level that looks good to you.
2. Power saver mode. I say turn it off. Granted, this probably isn't going to improve things, but it really doesn't save that much and tends to really slow the device down with CPU throttling.
3. If you on wifi, turning mobile data off doesn't save that much power either...but whatever

Honestly, 2.5 hours screen time in 10 hours is pretty heavy use. I agree your battery life should possibly be better, but with such a large screen and that much "on" time, it's not out of the question. What you are actually doing on the phone for that 2.5 hours is another question that help diagnose this problem (if there is one). Anything data- or CPU-intensive would obviously explain faster battery drain.

"Android OS" is also a very generic item that could account for a number of things...and may not even be a problem depending on what you're using the phone for.

My use is honestly checking Android Central, Reddit, Facebook and music that's on my SD not streaming. But the issue I'm facing is my friend has all the same uses and times and everything and our battery percentage difference is about 40%. Hell be at 70% when I'm at 30%.

My use is honestly checking Android Central, Reddit, Facebook and music that's on my SD not streaming. But the issue I'm facing is my friend has all the same uses and times and everything and our battery percentage difference is about 40%. Hell be at 70% when I'm at 30%.

I have I used Juice Defender Ultimate on many phones and it makes a huge difference. It seems to work very well on my S4. I used the Snapdragon Battery Guru for 2 weeks and it didn't seem to improve my battery life at all. With JD I'm usually off the charger 16 hours with 30-40% left. Spares are cheap so I keep one in my bag but have yet to need it.

Yup just about same screen on time. I'll be at like 2 1/2 hours and hell be at like 2 or so. The thing is I even went to the Samsung kiosk at Best Buy and the guy said the battery shouldn't drain that much. He's the one that told me to call Samsung.

Are you rooting? If so, I highly recommend Greenify + Wakelock detector. Greenify puts apps into hibernation mode so they don't run background processes. Wakelock detector helps you identify those apps you may want to hibernate. I easily got 4-5 hours on screen time using these 2. I had a hard time running my battery down and it would often be around 60% by bed time. I posted a thread a while back showing my usage using these apps. They do work with location services enabled.

Yeah man I agree with the greenify , also I notice clean rom on my s4 has better batt also most rooms do, also running android revolution or setinal on my one with greenify helps a lot to, I use to hate my s4 because of lag and rooting fixed that also